Champions League Group Stage: Barcelona vs Juventus

Valverde has suffered plenty at the hands of Messi in his coaching career at Espanyol, Valencia and Athletic Bilbao before being given the reigns at the Camp Nou.

Allegri has said, "Along with Real Madrid they are favorites to win the Champions League".

Manager Jorge Sampaoli has shown a preference for starting both men behind a focal point centre-forward of late, though the Albiceleste have majorly struggled for goals, leading to questions surrounding whether Messi and Dybala should share the pitch together at all. The third goal was added by Ivan Rakitic.

Sporting Lisbon held off a late fightback to beat Olympiakos 3-2 in Greece. After the first half, the guests had three goal advantage, and everything was clear even then.

PSG's next opponents in Group B will be five-time European champions Bayern Munich, who began their campaign by brushing aside Anderlecht 3-0 at the Allianz Arena.

With Giorgio Chiellini a doubt as well, Massimiliano Allegri might be forced to shuffle his defence and their three-man backline will have to bring their A-game if Messi and Co are to be kept quiet.

Lucas Vazquez got the equalizer 10 minutes later, when he tapped in the rebound after Levante goalkeeper Raul Fernandez saved Sergio Ramos' header. It took four games, but Juventus finally found that out in Barcelona's 3-0 victory on Tuesday. The Bavarians had enormous help from the guests who were playing with one player less on the field since the 11th minute. "We know we'll have our opportunities and we have to be careful to exploit them well".

In a worrying sight for United fans and coach Mourinho, captain Paul Pogba hobbled off with a possible left hamstring injury. This is the day 1 of UEFA Champions League 2017-18.